HIV/AIDS: the global epidemic.
D000293:Adolescent; D000328:Adult; D002648:Child; D003140:Communicable Disease Control / Q000458:organization & administration*; D004196:Disease Outbreaks / Q000517:prevention & control*; D005260:Female; D014943:Global Health; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D008297:Male; D011247:Pregnancy; D014480:United Nations